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154 lines
6.2 KiB
HTML
154 lines
6.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Word Designators (Debugging with GDB)</title>
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<meta name="description" content="Word Designators (Debugging with GDB)">
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<meta name="keywords" content="Word Designators (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="History-Interaction.html#History-Interaction" rel="up" title="History Interaction">
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<link href="Modifiers.html#Modifiers" rel="next" title="Modifiers">
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<link href="Event-Designators.html#Event-Designators" rel="prev" title="Event Designators">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Word-Designators"></a>
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<div class="header">
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<p>
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Next: <a href="Modifiers.html#Modifiers" accesskey="n" rel="next">Modifiers</a>, Previous: <a href="Event-Designators.html#Event-Designators" accesskey="p" rel="prev">Event Designators</a>, Up: <a href="History-Interaction.html#History-Interaction" accesskey="u" rel="up">History Interaction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Word-Designators-1"></a>
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<h4 class="subsection">33.1.2 Word Designators</h4>
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<p>Word designators are used to select desired words from the event.
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A ‘<samp>:</samp>’ separates the event specification from the word designator. It
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may be omitted if the word designator begins with a ‘<samp>^</samp>’, ‘<samp>$</samp>’,
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‘<samp>*</samp>’, ‘<samp>-</samp>’, or ‘<samp>%</samp>’. Words are numbered from the beginning
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of the line, with the first word being denoted by 0 (zero). Words are
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inserted into the current line separated by single spaces.
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</p>
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<p>For example,
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</p>
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<dl compact="compact">
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<dt><code>!!</code></dt>
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<dd><p>designates the preceding command. When you type this, the preceding
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command is repeated in toto.
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</p>
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</dd>
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<dt><code>!!:$</code></dt>
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<dd><p>designates the last argument of the preceding command. This may be
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shortened to <code>!$</code>.
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</p>
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</dd>
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<dt><code>!fi:2</code></dt>
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<dd><p>designates the second argument of the most recent command starting with
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the letters <code>fi</code>.
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</p></dd>
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</dl>
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<p>Here are the word designators:
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</p>
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<dl compact="compact">
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<dt><code>0 (zero)</code></dt>
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<dd><p>The <code>0</code>th word. For many applications, this is the command word.
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</p>
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</dd>
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<dt><code><var>n</var></code></dt>
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<dd><p>The <var>n</var>th word.
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</p>
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</dd>
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<dt><code>^</code></dt>
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<dd><p>The first argument; that is, word 1.
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</p>
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</dd>
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<dt><code>$</code></dt>
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<dd><p>The last argument.
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</p>
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</dd>
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<dt><code>%</code></dt>
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<dd><p>The word matched by the most recent ‘<samp>?<var>string</var>?</samp>’ search.
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</p>
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</dd>
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<dt><code><var>x</var>-<var>y</var></code></dt>
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<dd><p>A range of words; ‘<samp>-<var>y</var></samp>’ abbreviates ‘<samp>0-<var>y</var></samp>’.
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</p>
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</dd>
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<dt><code>*</code></dt>
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<dd><p>All of the words, except the <code>0</code>th. This is a synonym for ‘<samp>1-$</samp>’.
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It is not an error to use ‘<samp>*</samp>’ if there is just one word in the event;
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the empty string is returned in that case.
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</p>
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</dd>
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<dt><code><var>x</var>*</code></dt>
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<dd><p>Abbreviates ‘<samp><var>x</var>-$</samp>’
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</p>
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</dd>
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<dt><code><var>x</var>-</code></dt>
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<dd><p>Abbreviates ‘<samp><var>x</var>-$</samp>’ like ‘<samp><var>x</var>*</samp>’, but omits the last word.
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</p>
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</dd>
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</dl>
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<p>If a word designator is supplied without an event specification, the
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previous command is used as the event.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Modifiers.html#Modifiers" accesskey="n" rel="next">Modifiers</a>, Previous: <a href="Event-Designators.html#Event-Designators" accesskey="p" rel="prev">Event Designators</a>, Up: <a href="History-Interaction.html#History-Interaction" accesskey="u" rel="up">History Interaction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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